Heinemann FW, Klodwig J, Knoch F, Wundisch M, Zenneck U (1997)
Publication Status: Published
Publication Type: Journal article
Publication year: 1997
Publisher: VCH PUBLISHERS INC
Book Volume: 130
Pages Range: 123-130
Journal Issue: 1
Chiral or achiral (arene)(COD)Ru complexes can be made by replacing the eta(6)-ligands of (eta(4)-1,5-COD)(eta(6)-1,3,5-cyclooctatriene)Ru (1) or (eta(4)-1,5-COD)(eta(6)-naphthalene)Ru (2) by a suitable arene. This well known reaction has been extended to mono- and dibromoarenes and we report a novel route to substituted (arene)(COD)Ru species, utilizing (bromoarene)-(COD)Ru as starting materials. These facilitate a rapid bromine-lithium exchange reaction with nBuLi at low temperatures and the Lithiated species react readily with alkyl chloro-formates as electrophiles. By using chiral electrophiles [alkyl = (-)-menthyl] enantiomerically pure or diastereomeric complexes containing CO(2)R* groups are formed, depending on the symmetry of the original complex. A diastereomeric 1:1 mixture was separated by recrystallization. All (arene)-(COD)Ru complexes tested so far are useful as catalysts for the hydrogenation of simple alkenes at room temperature.
APA:
Heinemann, F.W., Klodwig, J., Knoch, F., Wundisch, M., & Zenneck, U. (1997). A specific route to enantiomerically pure asymmetric (eta(6)-arene)(eta(4)-1,5-cyclooctadiene)Ru(0) complexes. Chemische Berichte, 130(1), 123-130.
MLA:
Heinemann, Frank Wilhelm, et al. "A specific route to enantiomerically pure asymmetric (eta(6)-arene)(eta(4)-1,5-cyclooctadiene)Ru(0) complexes." Chemische Berichte 130.1 (1997): 123-130.
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